Adjustable miter rule attachment



Inventor 2 Sheets-Sheet l W. T. KEARN EY www,

@iElgw m E i vw ADJUSTABLE MITER RULE ATTACHMENT May 12, 1953 Filed Dec.25. 1949 Waller Kearrney By ,QAM

May 12, 1953 y w. T. KEARNEY 2,638,134

.ADJUSTABLE MITER RULE ATTACHMENT Filed Dec. 25. 1949 2 Sheets-Sheet 2Fl'g. 2.

I n ventar w/rek T. Kearney d/muy Patented May 12, 1953 ADJUSTABLEMI'I'ER RULE ATTACHMENT Walter T. Kearney, St. Louis, Mo., assigner AofAforty-nine per cent to Leroy Guittar, Sr., St.

Louis,.Mo.

ApplicationiDecember 23, 1949, Serial N o. 134,636

(Ol. y14R-86) Claims. l

This .invention relates to new and useful improvements in mitre rules,yand more particularly pertains to a combination mitre rule and visewherein novel means are provided for guiding oblique movement ofthemitrerule .and `for mov- `ing the same.

The primary object oi this invention is to en- "able an operator toyperform precise mitering while permitting his hands to be free fromhav- ;ing to hold the workpiece.

Another important `object of this invention is :to provide a mitre rulewhich is automatically adjusted for different sizes of work -and whichwill securely grip the same ,during mitering.

Still another important object of this invention, in conformity with theforegoing objects, is

to provide a mitre rule which is `eflicaeious in operation, simple andinexpensive in construction, and which .is durable and eiiicient for the,purposesintended y Almeritorious feature of the present inventionresides in the means provided for guidingoblique ymovement of `the mitrerule which will positively retain the same in parallel relation with theside rail.

*become apparent as the following description proceeds, are attained bythe `present invention, a preferred embodiment of which has beenillustrated by way of example only in the accom-l panying drawings,wherein:

Figure 1 is a top plan View of the present invention, concealed portionsbeing indicated in dotted outline, and showing the same engaging a pieceof work;

Figure 2 is a iront elevational View of the present invention;

Figure 3 is a side elevational view of the present invention, beingtaken from the right-hand side as seen in Figure 1;

Figure 4 is a vertical transverse sectional view of the presentinvention, being taken upon the plane Vof the broken section line 4-4 ofFigure 1; and

2 Figure 5 is va vertical longitudinal sectional view, being `taken uponthe plane of the section y line 5-5 of Figure 1.

Reference is now Vmade -more specieally to v'the 'accompanying drawings,`wherein like numerals designate similar Aparts `throughout the variousViews vand in which the mitre .rule is indicated generally by thenumeral IIJ.

The mitre rule `Ill comprises ra 'base 'I2 along one edge of which issecured, by means of fasteners I4, a vertical guide rail IB, which, raswill be seen hereinafter, 'also servesthe function of `being a fixedjaw.

`A mitre rule,-indicated generally at I8, is slidably 4mounted upon thebase I2 and has one edge 528 parallel to the `side rail I6. The mitrerule I8 has a second Aedge 2,2 that intersects vthe edge 28, beingpreferably at a forty-'live'degree angle theretd'and vthe edge `2l) isprovided with `suitable indicia 24 having Vits zero point at rthe`intersection of `the edges 2 8 land`22. It will also be noted that theedge 22 is substantially in lalignment with one end of the rail I6.

The base `l2 is provided with a pair of parallel guide slots 28, whichare parallel to the edge 22, and which slidingly receive guides 28, theimitre rule I8 being ysecured to the latter Aby means of fasteners 38.Itwillbe understood 'that Ithis arrangement limits sliding movementofthemitre rule i 8 ,on the base I2, to being parallel `to `the edge 22, yandthat .the edge'20 will be retained in parallel `relationship with `theguide rail It,

[Mitre .rule I8 is retained on the base I2 by means of a .tie har 132which is disposed on the opposite side .of the `base I.2 and `securedtothe guides 42 8 .bymeans of fasteners 33.

A hand lever it is ,disposed beneath .the vbase I2 and opposite theedgeto which the guide rail I6 is secured, and ispivoted to the base I2for .horizontal .movement yas .by lpinion bearings 38.

Eccentrically to its own pivot, the -hand lever 36 is pivoted at 48 toone endof an offset connecting link 42, which in turn has its other endpivoted to the tie bar 3'2, as at 44. As thus far described, it will beevident that oscillatory movement of the hand lever 36 about its pivot38 will, through the connecting link 42, the tie bar 32, and guides 28,cause the mitre rule I8 to move toward and away from the guide rail I6.

Means is provided for normally urging the edge 20 `of the mitre rule I8into engagement with the guide rail I 5. These means include a lspringmount 46 threadedly engaging the hand lever 3'6 and extending downwardlytherefrom. The mount 46 carries at its lower end a pivoted member 4Bhaving 'an annular groove '50 by means of a fastener 52. A pair oflongitudinally spaced brackets 54 are secured to and depend from thebase l2, the arrangement being such that the brackets 54 and the mount4B are disposed substantially at the apices of an imaginary equilateraltriangle. A pair of coiled tension springs 56 and 58 are secured to thebrackets 54 and have their other ends engaging the hooked ends El] of aV-shaped spring-engaging element 62, the apex of which is received inthe groove 50.

As shown in Figure 1, it will be evident that clockwise rotation of thehand lever 3E will cause the mitre rule I8 to move toward the guide railI6, vand it is to be noted that the spring mount 46 is disposedeccentrically with respect to the pivot 38, whereby the springs 55 and58 tend to cause clockwise rotation of the lever 36 and closure of themitre rule i8 with the guide rail i6. It will be appreciated that twosprings have been provided in the preferred construction in order that asuiiicient couple will act on the hand lever 36 throughout its angularVoscillations to exert a considerable clamping force between 'the mitrerule I8 and the guide rail l t.

The operation 'of the present invention will be readily understood. Theoperator, after trimming rst mitre, pulls the hand lever 36 into aposition opening the mitre rule i8 and the guide rail l5, and theninserts material Gli to the required dimension on the mitre rule and theoperator then releases the lever, allowing the rule to grip vthematerial automatically between the mitre rule I8 and the guide rail IS,regardless of the dimensions of the material t4. With the work 64 thuspositioned as desired, the edge 22 of the mitre rule constitutes a guideedge for a saw, not shown, for cutting or mitering the work '64, as willbe understood. It is to be noted that by virtue of the edge 22 beingparallel to the guide slots 26, the guide edge 22 remains substantiallyin alignment with one end of the rail I6, so that the opposite sides ofthe work -64 are securely clamped immediately adjacent the plane atwhich the work will be `cut by a 'saw guided by the edge 22,irrespective of the adjustment of the device for the width o-f the work.inasmuch as the end vof the rail It terminates in substantial alignmentwith the guide edge 22, `a saw may be guided in cutting the work 64 byboth the end edge of the rail I6 and the edge 22.

It is believed that the advantages of the present invention will bereadily appreciated by those skilled in the art in that the same permitsflexibility and ease for the operator, increases lproduction, as thesame automatically grips the work, it ldecreases the hazards of thisoperation because both hands of the operator are free during mitering,and the yarrangement of the parts of the device permit the same to bereadily used .on shears or saws.

From the foregoing, the construction and operation of the device will bereadily understood land further explanation is believed to beunnecessary. However, since numerous modifications and changes willreadily occur to those skilled in the art after a consideration of theforegoing speciiication and accompanying drawings, it is not desired tolimit the invention to the exact construction shown and described, butall suitable modications and equivalents may be resorted to, fallingwithin the scope of the appended claims.

Having described the claimed as new is:

1. A combined mitre rule and vise, comprising la base having a xedupstanding guide rail along one edge thereof, a mitre rule movablymounted on said base and having an edge parallel to and engageable withsaid rail, said rule having a second edge intersecting the first edge atan oblique angle and substantially aligned with an edge of the rail,means for guiding movement of the rule on the base in a directionparallel to said second edge with the rst edge being maintained parallelto said rail, and nieans connected to said base and operativelyconnected to said rule for yieldingly urging said rule towards said railfor engaging a piece of work therebetween.

2. The combination or" claiin 1, wherein said iirst means includes thebase being provided with a pair of guide slots, a pair of guides 'onsaid rule guidedly received insa-id slots.

3. The combination of claim 1, wherein said first means includes thebase being provided with a pair of guide slots, a pair of guides on saidrule guidedly received in said slots, said last means including a handlever pivcted to the base and operatively connected to the guides.

4. The combination of claim 3 including, a tie bar connecting saidguides, said hand lever being `disposed on the under side of the base,and a link having one end pivoted to the lever and the other pivoted tothe tie bar.

5. The combination of claim 4, wherein said last named means alsoinclude tension springs arranged in V formation with corresponding endssecured to said hand lever eccentrically with respect to pivotalconnection between the lever and base, the other ends or" said springsbeing secured to said base.

WALTER T. KEARNEY.

invention, what is References Cited in the file of this patent UNTTEDSTATES PATENTS Number Name Date 154,234 Everett Aug. 18, 1874 1,805,395Glass May l2, 1931 1,957,709 Haynes May 8, 1934 2,254,541 Nordgren Sept.2, 1941

